EEC said:With feed entering J-box in ceiling and then installing 3 wire MC down too each switch. Which color wires do you use to be code complaint?
The jacket on MC is not a suitable EGC (330.108/250.118(10)) unless listed and identified as such....a "new variant" (MC-AP) meets this requirement.brantmacga said:down here we're required to have a separate grounding conductor in all mc cable no matter what type of connector is used ...
brantmacga said:AND we have to pigtail one to the box and one to the device (yep).
4-wire?brantmacga said:check w/ your local inspector to make sure they allow it. typically i'd just use 4 wire w/ the blacks being common and red & white as travelers.
EEC said:With feed entering J-box in ceiling and then installing 3 wire MC down too each switch. Which color wires do you use to be code complaint?
Are you serious? How effective is that? What do you have a sharpie for each size wire 14, 12 ,10 etc...stickboy1375 said:I don't use tape, I normally drill a hole in a sharpie tip and insert the wire thru the hole in the sharpie to re identify it...
celtic said:The jacket on MC is not a suitable EGC (330.108/250.118(10)) unless listed and identified as such....a "new variant" (MC-AP) meets this requirement.
The connector is not relevant as the jacket on the older type is not listed as EGC.
Isn't that SOP?
404.9 (A) & (B)
4-wire?
12(14)/3 MC will have Black-Red-White conductors in addition to the green EGC.
What are you doing with the fourth wire?
B/W/Gr MC is 2 wire.....brantmacga said:he asked about color using three wire, so i assumed he was talking about black white and green.
brantmacga said:snap-tite connectors are listed for using the sheathing as EGC. 404.9 -- i use metal boxes, therefore metal device screws provide the ground.
chevyx92 said:Are you serious? How effective is that? What do you have a sharpie for each size wire 14, 12 ,10 etc...
celtic said:B/W/Gr MC is 2 wire.....
same as for Romex ~ ##/2 consists of BW and a bare EGC....
same for type AC (BX) ~ ##/2 B/W #16(?) bonding strap.
But only IF the sheath is listed as an EGC...and that will depend on the wiring
type used ~ MC or MC-AP.
But this would strike me as a downright _evil_ installation.
chevyx92 said:Are you serious? How effective is that? What do you have a sharpie for each size wire 14, 12 ,10 etc...
I think that there is.I don't believe that there is any explicit prohibition against using that _green_ insulated conductor as an _ungrounded_ circuit conductor.
Don250.119 Identification of Equipment Grounding Conductors
Unless required elsewhere in this Code, equipment grounding conductors shall be permitted to be bare, covered, or insulated. Individually covered or insulated equipment grounding conductors shall have a continuous outer finish that is either green or green with one or more yellow stripes except as permitted in this section. Conductors with insulation or individual covering that is green, green with one or more yellow stripes, or otherwise identified as permitted by this section shall not be used for ungrounded or grounded circuit conductors.
brantmacga said:AND we have to pigtail one to the box and one to the device (yep).
don_resqcapt19 said:Jon,
I think that there is.
Don